1) Atomic structure, e- configuration

Question 1

D) Atomic number

Answer 1

Z, no. of protons or electrons

Question 2

D) Mass number

Answer 2

A, Atomic number (Z) + no. of neutrons

Question 3

E) speed of light

Answer 3

c = wavelength x speed
c= 2.997x10^8 m/s

Question 4

E) Energy of photons

Answer 4

E= h x speed
h= 6.62 x 10^ -34 J.S

Question 5

E) wavelength

Answer 5

wavelength = h/ (mass x speed)

Question 6

D) quantum numbers

Answer 6

Principal: n = 1,2,3
Subshell: l = n-1
Orbital: ml = -l … 0 … +l
Spin: ms = +- 1/2

Question 7

D) subshells

Answer 7

sharp - 2 e-
principal - 6 e-
diffuse - 10 e-
fine - 14 e-

Question 8

D) Periodic table trends

Answer 8

Electron affinity, Ionisation energy - incr right, incr up
Radius - incr left, incr down

Question 9

D) electron charge/mass ratio
electron charge
electron mass

Answer 9

q/m = 1.76 x 10 ^8 C/g
charge = 1.6 x 10^-19 C
mass = 9.1093 x 10 ^-28 g

Question 10

E) Effective nuclear charge

Answer 10

Zeff = Zactual - electron shielding

Question 11

D) Paulis exclusion
Hunds
Aufbau

Answer 11

max 2 e-, with opp spin
half fill all orbitals first
lowest to highest energy filled

Question 12

D) all history of atom

Answer 12

1) Boyle - substance that cannot be broken down further
2) Priestly - prepared elements from compounds
3) Lavioisier - law of conservation of mass
4) Proust - Law of definite proportions
5) Dalton - Law of multiple proportions. matter = small, indivisible spheres
6) Thomson - Plum pudding model
7) Rutherford - alpha particles
8) Bohr - electrons in orbit
9) Schrodinger - wave equation, determined energy level length
10) Quantum mechanical model - e- exist in specific orbits around a nucleus